Vacuum cleaner



FIG. 1 is a right side perspective view taken from the front and side showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view; the right side view being a mirror image thereof;

FIG. 4 top plan view; and,

FIG. 5 is a rear view thereof.

The portion of the tank shown in broken lines forms no part of the claimed design. 

The ornamental design for a vacuum cleaner, as shown and described. 